This once rural mansion now sits in the heart of the city.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

The cinder cone volcano with a less than complimentary name.

A geological mystery on Camelback Mountain.

An architect in Aspen used psychedelics as his muse while building this mushroom masterpiece.

The Jewish section of the famous Boothill Graveyard was abandoned for nearly 100 years.

A stone pillar marking the location of the westernmost battle of the American Civil War only honors one side of the conflict.

This statue is an ode to an iconic roadside advertisement popularized during the 1970s.

A collection of over 2000 air-moving devices of all kinds displayed in the Fanimation headquarters.

Locals dubbed this abandoned abode the "gingerbread house" because of its odd architecture.

This mysterious hill seems to pull objects uphill.

This tiny museum kept in a B&B laundry room holds the death mask of notorious bank robber Pretty Boy Floyd.

There are more than 4 million bricks inside this unofficial Lego museum in a former middle school.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

A giant, Gilded Age mansion that once belonged to the beer baron of Milwaukee.

An off-the-beaten-path place to literally hang beneath Milwaukee's Holton Street Bridge.

In the 19th century, this was the center of Boston's Black community.

This historic Boston building has gone from personal estate to porn theater and back again.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

This rare basilica nestled right in downtown Asheville is an architectural marvel, inside and out.

This factory made "health corsets" that were a step towards liberating women's bodies.

The basement bowling alley of this St. Paul dive bar is decorated with thousands of dollar bills.